I don't get that option when I hold on an email, but I do get it when you go to the Menu soft key on the bottom right.
Menu > Follow Up >
Set Flag
Complete Flag
Clear Flag
But they are all grayed out!!!!
Not sure if it matters, but I'm using HouMing File Explorer Extension
http://forum.xda-developers.com/showthread.php?t=421723
and kPen SafeInboxExtender
http://pdaphonehome.com/forums/samsu...xextender.html